From 2a853aea6754341a069191999a53d2065f49cf34 Mon Sep 17 00:00:00 2001
From: Christoph Dreis <christoph.dreis@freenet.de>
Date: Fri, 4 Nov 2022 13:00:02 +0100
Subject: [PATCH] Avoid String allocations in MediaType.checkParameters

Closes gh-29428
---
 .../src/main/java/org/springframework/http/MediaType.java   | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/spring-web/src/main/java/org/springframework/http/MediaType.java b/spring-web/src/main/java/org/springframework/http/MediaType.java
index c30efd4c3f0e..d3e83775109b 100644
--- a/spring-web/src/main/java/org/springframework/http/MediaType.java
+++ b/spring-web/src/main/java/org/springframework/http/MediaType.java
@@ -531,10 +531,10 @@ public MediaType(MimeType mimeType) {
 	protected void checkParameters(String parameter, String value) {
 		super.checkParameters(parameter, value);
 		if (PARAM_QUALITY_FACTOR.equals(parameter)) {
-			value = unquote(value);
-			double d = Double.parseDouble(value);
+			String unquotedValue = unquote(value);
+			double d = Double.parseDouble(unquotedValue);
 			Assert.isTrue(d >= 0D && d <= 1D,
-					"Invalid quality value \"" + value + "\": should be between 0.0 and 1.0");
+					() -> "Invalid quality value \"" + value + "\": should be between 0.0 and 1.0");
 		}
 	}